res_pjsip: Resolve transport management leak at shutdown.

Cleanup idle check scheduled events at shutdown.

Change-Id: I61bfbb56bac69fe840c3242927d31ff3593be461

res/res_pjsip/pjsip_transport_management.c

@@ -119,10 +119,8 @@ static void *keepalive_transport_thread(void *data)
 
 AST_THREADSTORAGE(desc_storage);
 
-static int idle_sched_cb(const void *data)
+static int idle_sched_init_pj_thread(void)
 {
-	struct monitored_transport *monitored = (struct monitored_transport *) data;
-
 	if (!pj_thread_is_registered()) {
 		pj_thread_t *thread;
 		pj_thread_desc *desc;
@@ -130,8 +128,7 @@ static int idle_sched_cb(const void *data)
 		desc = ast_threadstorage_get(&desc_storage, sizeof(pj_thread_desc));
 		if (!desc) {
 			ast_log(LOG_ERROR, "Could not get thread desc from thread-local storage.\n");
-			ao2_ref(monitored, -1);
-			return 0;
+			return -1;
 		}
 
 		pj_bzero(*desc, sizeof(*desc));
@@ -139,6 +136,18 @@ static int idle_sched_cb(const void *data)
 		pj_thread_register("Transport Monitor", *desc, &thread);
 	}
 
+	return 0;
+}
+
+static int idle_sched_cb(const void *data)
+{
+	struct monitored_transport *monitored = (struct monitored_transport *) data;
+
+	if (idle_sched_init_pj_thread()) {
+		ao2_ref(monitored, -1);
+		return 0;
+	}
+
 	if (!monitored->sip_received) {
 		ast_log(LOG_NOTICE, "Shutting down transport '%s' since no request was received in %d seconds\n",
 			monitored->transport->info, IDLE_TIMEOUT / 1000);
@@ -149,6 +158,18 @@ static int idle_sched_cb(const void *data)
 	return 0;
 }
 
+static int idle_sched_cleanup(const void *data)
+{
+	struct monitored_transport *monitored = (struct monitored_transport *) data;
+
+	if (!idle_sched_init_pj_thread()) {
+		pjsip_transport_shutdown(monitored->transport);
+	}
+	ao2_ref(monitored, -1);
+
+	return 0;
+}
+
 /*! \brief Destructor for keepalive transport */
 static void monitored_transport_destroy(void *obj)
 {
@@ -384,6 +405,7 @@ void ast_sip_destroy_transport_management(void)
 
 	internal_sip_unregister_service(&idle_monitor_module);
 
+	ast_sched_clean_by_callback(sched, idle_sched_cb, idle_sched_cleanup);
 	ast_sched_context_destroy(sched);
 	sched = NULL;